研究了用硫酸亚铁–硝酸钾氧化法在凹凸棒石悬浮液中即时合成磁铁矿制备凹凸棒石–Fe3O4纳米复合材料的可行性以及凹凸棒石对磁铁矿晶体生长控制和影响。X射线粉末衍射、透射电镜、磁化率分析等表征手段的分析结果表明:在制备凹凸棒石负载Fe3O4复合材料的过程中,凹凸棒石投加量和煅烧温度对复合材料的物相组成、形貌特征及磁学性质具有明显的影响。随着凹凸棒石添加量的增加,纳米Fe3O4颗粒变细、粒径分布更均匀。当凹凸棒石煅烧温度超过400℃以后,由于凹凸棒石表面性质的改变,抑制了Fe3O4结晶。

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